<template>
  <div class="homeSideBar">
    <ul class="menu" v-if="sideList.length>0">
      <li v-for="item in sideList" :key="item.id">
        <router-link :to="`/category/${item.id}`">{{item.name}}</router-link>
        <template v-if="item.children.length">
          <RouterLink v-for="sub in item.children" :key="sub.id" :to="`/category/sub/${sub.id}`">
            {{sub.name}}
          </RouterLink>
        </template>
        <!-- 类目对应弹层 -->
        <div class="layer">
          <h4>分类推荐 <small>根据您的购买或浏览记录推荐</small></h4>
          <ul>
            <li v-for="good in item.goods" :key="good.id">
              <!-- 图片源数组 -->
              <RouterLink :to="`/goods/${good.id}`">
                <img :src="good.picture" alt="">
                <div class="info">
                  <p class="name ellipsis-2">{{good.name}}</p>
                  <p class="desc ellipsis">{{good.desc}}</p>
                  <p class="price"><i>¥</i>{{good.price}}</p>
                </div>
              </RouterLink>
            </li>
          </ul>
        </div>
      </li>
    </ul>
<!-- 灭有数据的时候就先展示骨架屏幕，结构和真实数据结构是一致的 -->
    <template v-else>
      <ul class="menu">
        <li v-for="i in 9" :key="i">
          <!-- 骨架屏组件 -->
          <XtxSkeleton :width="40" :height="20" bg="rgba(255,255,255,.2)" style="margin-right:5px"></XtxSkeleton>
         <XtxSkeleton :width="40" :height="20" bg="rgba(255,255,255,.2)" style="margin-right:5px"></XtxSkeleton>
          <XtxSkeleton :width="40" :height="20" bg="rgba(255,255,255,.2)" style="margin-right:5px"></XtxSkeleton>
        </li>
      </ul>
    </template>

  </div>
</template>

<script>
import { useStore } from 'vuex'
import { computed } from 'vue'
export default {
  setup () {
    const store = useStore()

    const sideList = computed(() => {
      const list = store.state.category.list.map(item => {
        return {
          id: item.id,
          name: item.name,
          children: item.children && item.children.slice(0, 2),
          goods: item.goods
        }
      })
      return list
    })
    return {
      sideList
    }
  }
}
</script>

<style lang="less" scoped>
.homeSideBar {
  text-align: left;
  width: 250px;
  height: 450px;
  background: rgba(0, 0, 0, 0.8);
  position: relative;
  z-index: 99;
  .menu > li {
    padding-left: 40px;
    height: 50px;
    line-height: 50px;
    &:hover {
      background: @xtxColor;
    }
    &:hover {
      .layer {
        display: block;
      }
    }
    a {
      margin-right: 4px;
      color: #fff;
      &:first-child {
        font-size: 16px;
      }
    }
  }

  .layer {
    width: 990px;
    height: 500px;
    background: rgba(255, 255, 255, 0.8);
    position: absolute;
    left: 250px;
    top: 0;
    display: none;
    padding: 0 15px;
    h4 {
      font-size: 20px;
      font-weight: normal;
      line-height: 80px;
      text-align: left;
      small {
        font-size: 16px;
        color: #666;
      }
    }
    ul {
      display: flex;
      flex-wrap: wrap;
      li {
        width: 310px;
        height: 120px;
        margin-right: 15px;
        margin-bottom: 15px;
        border: 1px solid #eee;
        border-radius: 4px;
        background: #fff;
        &:nth-child(3n) {
          margin-right: 0;
        }
        a {
          display: flex;
          width: 100%;
          height: 100%;
          align-items: center;
          padding: 10px;
          &:hover {
            background: #e3f9f4;
          }
          img {
            width: 95px;
            height: 95px;
          }
          .info {
            padding-left: 10px;
            line-height: 24px;
            width: 190px;
            .name {
              font-size: 16px;
              color: #666;
            }
            .desc {
              color: #999;
            }
            .price {
              font-size: 22px;
              color: @priceColor;
              i {
                font-size: 16px;
              }
            }
          }
        }
      }
    }
  }
}
</style>
